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‎01-20-2021 06:37 AM

HP Recommended
Product: HP ProDesk 400 G5 SFF

Hello,

 

After the desktop performed a windows update by itself it restarted and then started to turn on and off repeatedly. I have uploaded a small video of the behavior here

 

https://www.youtube.com/watch?v=tOSzRx6VhxI

 

I tried a hard reset, restarting the CMOS, changing the power supply and motherboard. Later I found out that 3 other desktops (same model and characteristics) started to behave the same and one of them was doing a windows update right before.

 

Since I was unable to isolate the problem. I tried putting the hard drive on another PC and the problem persisted, funny enough now the other system started to behave the same way.

 

They are still under warranty and I tried the HP contact support but the chat is unavailable in my region and the phone numbers provided do not work either. Any help is appreciated.

1 REPLY 1

‎01-20-2021 05:35 PM - edited ‎01-20-2021 05:37 PM

HP Recommended

Hi,

 

You replaced the MB and the power supply (common culprits). A short can cause this behavior which causes the power supply to reset.

 

You moved the HDD to a different PC. Now you have the same problem on a different, stable PC.

 

Bad HDD?

 

Regards

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